Astronaut Chris Hadfield, currently aboard the International Space Station, said it is likely "inevitable" people will go to Mars. Here's a new rap:

Up and up we go
High amongst the Stars

Mission now we'll be going to Mars

We grow 1 cm a month while in space
This phenomena would lead 
it seems

to a future new race 
of "Space Globetrotter teams".

Henri van Bentum